NUMBERING PLAN - All NANP
+1 12D NANP +1 00 nxx nxx xxxx CANADA +1 nxxx xxxx xxxx US +1 99 nxx nxx xxxx non-US/Canada
DIALING PLAN - US
0 0 0 Local Operator (timeout) 00 00 00 LD Operator (timeout) 001 001 nxxx dnxx xxxx 001+ Operator Assisted NANP, including 001 00 nxx nxx xxxx 001+00 Operator Assisted Canada 001 nxxx dnxx xxxx 001+ Operator Assisted NPAX 001 99 nxx nxx xxxx 001+99 Operator Assisted Other NANP 00n 00 nxxxxxxxxxxxxxx 00+ Sent Paid International 011 011 nxxxxxxxxxxxxxx 011+ Sent Paid International 01n 01 nxxxxxxxxxxxxxx 01+ Operator Assisted International 0n 0nxx xxxx 8D Sent Paid 8D Dialing (where permitted) 100 1 00 nxx nxx xxxx 100+ Sent Paid Canada 101 101xxxx Carrier Access Codes 10n 10 nxx nxx xxxx 10+10D "Ten plus Ten Digits" Transition 1n 1 nxxx dnxx xxxx 1+ Sent Paid NPAX 1 99 nxx nxx xxxx 199+ Sent Paid Other NANP n nxxx xxxx 8D Sent Paid 8D Dialing (where permitted) Short Dials, such as 911, 311, 411, 611, etc exist in this range. Care is taken to start no 8D number with a code that would conflict.
DIALING PLAN - CANADA
As US above, with the following exceptions: 0n 0nxx xxxx 0+7D 7D Dialing (permissive) or 0a nxx xxxx 0+8D Overlay Dialing (within overlay) n nxx xxxx 7D 7D Dialing (where permitted) nxx nxx xxxx 10D 10D Dialing (where permitted)Canadian regulators may wish to take advantage of these patterns in different ways.
DIALING PLAN - Other Countries
As US above, with the following exceptions: 0n 0nxx xxxx 0+7D Sent Paid or Operator Assisted 7D (permissive, where permitted) n nxx xxxx 7D 7D Dialing (where permitted)
SummaryObviously these are my thoughts, but they do show an integrated plan for +1, the NANP, that provides for migration from 7D -> 8D dialing as well as from 10D -> 12D numbering without a great deal of stress on the system or the subscribers.
One final note about longer that 10D: Many pieces of equipment have fixed length dialing strings. While most can accept more that the current 10D number or 11D dialing string, it would be best that longer strings be accepted now.
This will require adapting the field accepts in software and possibly adding more memory in hardware. In addition, equipment such as cellphones that display based on 10D/7D numbers will need to handle longer numbers. (In addition to accepting a longer number as part of the MIN/MDN entries.)
Expanding to 12D/8D is more than a simple paper, it is a process that involves everyone in any industry that uses the numbering system in their product. That is a lot of people.
Any corrections, questions, clarifications, etc. can be emailed to me. I may not be able
to reply to every message.